Overview
BrasilAPI is a free, community-driven API that centralizes public data about Brazil in one easy-to-use place. You can look up ZIP codes, bank information, CNPJ company data, Brazilian holidays, and much more without any API key. It is one of the best open APIs for developers working with Brazilian data.
Beginner Tip
Start with the CEP (ZIP code) endpoint—it is the most straightforward and returns rich address data including city, state, and neighborhood in a clean JSON format.
Measurement Record
What actually happened when we called this API from our own infrastructure. Every value below was recorded by the request, not copied from the provider's documentation.
- Request
- GET https://brasilapi.com.br/api/cep/v1/01001000
- Result
- HTTP 200 · application/json · 157 bytes · compressed
- Response time
- 52 ms (median of 3) · fastest 51 ms
- Transport
- TLSv1.3 · TLS_AES_256_GCM_SHA384 · certificate issued by Google Trust Services
- Browser CORS
- Allowed — Access-Control-Allow-Origin: *
- Served by
- cloudflare
- Recorded
- 2026-08-10
Fields Returned
Top-level fields present in the response we captured, with the type and value we actually received.
| Field | Type | Value received |
|---|---|---|
| cep | string | 01001000 |
| state | string | SP |
| city | string | São Paulo |
| neighborhood | string | Sé |
| street | string | Praça da Sé |
| service | string | open-cep |
| ibge | object | {2 fields} |
Captured Response
Captured from a real request to https://brasilapi.com.br/api/cep/v1/01001000 on 2026-08-10. Long arrays and nested objects are truncated to keep the shape readable.
{
"cep": "01001000",
"state": "SP",
"city": "São Paulo",
"neighborhood": "Sé",
"street": "Praça da Sé",
"service": "open-cep",
"ibge": {
"city": "3550308",
"state": "35"
}
} Field Reference
cep The 8-digit Brazilian postal code (CEP) that was queried state Two-letter Brazilian state abbreviation (e.g. SP, RJ) city Name of the city corresponding to the ZIP code neighborhood Neighborhood or district within the city street Street name associated with the postal code Implementation Example
Calls a real endpoint of this API. Replace any placeholder credentials with your own key.
const url = "https://brasilapi.com.br/api/cep/v1/01001000";
const response = await fetch(url);
if (!response.ok) throw new Error(`Request failed: ${response.status}`);
const data = await response.json();
console.log(data); What Can You Build?
Note: These code examples are AI-generated and unverified. Always refer to the official API documentation for accurate usage.
How This API Fails
We deliberately sent this API a broken request and recorded exactly what came back on 2026-08-10. Knowing the shape of an error before you hit it makes error handling much easier to write.
Returned an HTML error page rather than JSON — worth knowing if your client assumes every response can be parsed as JSON.
Common Errors & Troubleshooting
Generated guidance based on this API's documentation, not observed by us. Treat it as a starting point and check against the provider's own error reference.
Measured Score Breakdown
Live HTTP request to the API endpoint
Fully tested on Aug 10, 2026
Technical Specifications
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